[Note 1] In three patrols UC-19 was credited with sinking four ships, either by torpedo or by mines laid.

UC-19 was sunk by depth charges from HMS Leeuwenhoek in the English Channel on 6 December 1916.

She had a dive time of 35 seconds and was capable of operating at a depth of 50 metres (160 ft).

When submerged, she could operate for 55 nautical miles (102 km; 63 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 9,430 nautical miles (17,460 km; 10,850 mi) at 7 knots (13 km/h; 8.1 mph).

UC-19 was fitted with six 100 centimetres (39 in) mine tubes, eighteen UC 200 mines, three 50 centimetres (20 in) torpedo tubes (one on the stern and two on the bow), seven torpedoes, and one 8.8 cm (3.5 in) Uk L/30 deck gun.